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Which OSPF feature allows a router with redundant route processors to maintain its OSPF state and adjacencies across planned and unplanned RP switchovers and does this by checkpointing state information from OSPF on the active RP to the standby RP? This feature does not require the OSPF neighbor to support graceful restart.

NSR

NSF

BFD

MTR

SDR

Which high-availability mechanism is a detection protocol that is enabled at the interface and at the routing protocol levels?

NSF

SSO

NSR

BFD

SDR

In comparing IS-IS with OSPF, a Level-1-2 IS-IS router is similar to which kind of OSPF router?

ASBR on a normal OSPF area

ASBR on NSSA

ABR on totally stubby OSPF area

ABR on stubby OSPF area

ABR on a normal OSPF area

When configuring IPv4 and IPv6 IS-IS routing on Cisco IOS XR routers, which three statements are correct? (Choose three.)

By default, a single SPF is used for both IPv4 and IPv6, so the IPv4 and IPv6 topology should be the same.

By default, the IS-IS router type is Level 1 and Level 2.

All IS-IS routers within the same IS-IS area must be configured with the same IS-IS routing process instance ID.

By default, metric-style narrow is used.

By default, the IS-IS interface circuit type is Level 1 and Level 2.

The area IS-IS address-family configuration command is used to specify the IS-IS area address.

Which four statements are correct regarding IS-IS operations? (Choose four.)

By default, Level 1 routers within an IS-IS area do not carry any routing information external to the area to which they belong. They use a default route to exit the area.

Summarization should be configured on the Level 2 routers, which injects the Level 2 routes into Level 1.

IS-IS supports “route leaking” in which selected Level 2 routes can be advertised by a Level 1/Level 2 router into Level 1.

The IS-IS backbone is a contiguous collection of Level 1 capable routers, each of which can be in a different area.

With IS-IS, an individual router is in only one area, and the border between areas is on the link that connects two routers that are in different areas.

to connect an OSPF non-backbone area to area 0 through another non-backbone area

to connect an NSSA area to an external routing domain

to connect two parts of a partitioned backbone area through a non-backbone area

to enable route leaking from Level 2 into Level 1

to enable route leaking from Level 1 into Level 2

to enable OSPF traffic engineering

Which three statements are true regarding the OSPF router ID? (Choose three.)

The OSPF routing process chooses a router ID for itself when it starts up.

The router-id command is the preferred procedure to set the router ID.

If a loopback interface is configured, its address will always be preferred as the router ID over any other methods.

After the router ID is set, it does not change, even if the interface that the router is using for the router ID goes down. The router ID changes only if the router reloads or if the OSPF routing process restarts.

In OSPF version 3, the OSPF router ID uses a 128-bit number.

On Cisco IOS XR Software, which set of commands is used to enable the gi0/0/0/1 interface for OSPF in area 0?

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In comparing IS-IS with OSPF, a Level-1-2 IS-IS router is similar to which kind of OSPF router?
A. ASBR on a normal OSPF area
B. ASBR on NSSA
C. ABR on totally stubby OSPF area
D. ABR on stubby OSPF area
E. ABR on a normal OSPF area
Answer: C

Which high-availability mechanism is a detection protocol that is enabled at the interface and at the routing protocol levels?
A. NSF
B. SSO
C. NSR
D. BFD
E. SDR
Answer: D

Which OSPF feature allows a router with redundant route processors to maintain its OSPF state and adjacencies across planned and unplanned RP switchovers and does this by checkpointing state information from OSPF on the active RP to the standby RP? This feature does not require the OSPF neighbor to support graceful restart.
A. NSR
B. NSF
C. BFD
D. MTR
E. SDR
Answer: A

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Which two statements correctly describe the BGP ttl-security feature? (Choose two.)
A. This feature protects the BGP processes from CPU utilization-based attacks from EBGP neighbors which can be multiple hops away
B. This feature prevents IBGP sessions with non-directly connected IBGP neighbors
C. This feature will cause the EBGP updates from the router to be sent using a TTL of 1
D. This feature needs to be configured on each participating BGP router
E. This feature is used together with the ebgp-multihop command
Answer: A,D

When implementing source-based remote-triggered black hole filtering, which two configurations are required on the edge routers that are not the signaling router? (Choose two.)
A. A static route to a prefix that is not used in the network with a next hop set to the Null0 interface
B. A static route pointing to the IP address of the attacker
C. uRPF on all external facing interfaces at the edge routers
D. Redistribution into BGP of the static route that points to the IP address of the attacker
E. A route policy to set the redistributed static routes with the no-export BGP community
Answer: A,C

In Cisco IOS-XR, the maximum-prefix command, to control the number of prefixes that can be installed from a BGP neighbor, is configured under which configuration mode?
A. RP/0/RSP0/CPU0:P2(config-bgp)#
B. RP/0/RSP0/CPU0:P2(config-bgp-af)#
C. RP/0/RSP0/CPU0:P2(config-bgp-nbr)#
D. RP/0/RSP0/CPU0:P2(config-bgp-nbr-af)#
Answer: D

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On the Cisco IOS XR, which MQC configuration is different than on the Cisco IOS and IOS XE?

A. On the Cisco IOS XR, WRED can only be applied in the output direction.
B. On the Cisco IOS XR, marking can only be applied in the input direction.
C. On the Cisco IOS XR, LLQ can be applied in the input or output direction.
D. On the Cisco IOS XR, LLQ can use up to four priority queues: level 1, level 2, level 3, and level 4.
Answer: C

On Cisco routers, how is hierarchical QoS implemented?
A. Within the parent policy, reference another child policy using the policy-map command.
B. Within the child policy, reference another parent policy using the policy-map command.
C. Use the policy-map command within a service-policy to implement nested policy-maps.
D. Within the parent policy-map, reference another child policy-map using the service-policy command.
Answer: D

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Within the service provider IP/MPLS core network, what must be implemented to enable Layer 3 MPLS VPN services?
A. IS-IS or OSPF on all the PE and P routers
B. MP-BGP between the PE routers
C. RSVP on all the PE and P routers
D. targeted LDP between the PE routers
E. LDP between the CE and PE routers
Answer: B

In MPLS Layer 3 VPN implementations, which mechanism is used to control which routes are imported to a VRF?
A. RT
B. RD
C. VC ID
D. PW ID
E. VRF ID
Answer: A

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